Step 6: Get Scaring

Cut holes in your box so that the speaker cord, switch, and the long cable (vibration sensor attached) can be outside.

Make sure that the long cable with the vibration sensor is outside of the container.

Secure the plastic box and the speaker to your trashcan using more DualLock/Velcro/thing. Make sure the plastic box is easily accessible and will not interfere with any normal uses of the trash can (e.g. it won't be hit by lid).

Duct tape the vibration sensor to the bottom center of your trash can lid.